HV257 Datasheet PDF

Supertex HV257

HV257 is a 32-channel, high voltage, sample and hold amplifier array integrated circuit. It operates on a single high voltage supply, up to 300V, and two low voltage supplies, VDD and VNN. The individual sample and hold circuits are selected by a 5 to 32 logic decoder.

Part No.	HV257
Datasheet	HV257 Download
Manufacturer	Supertex
Description	32-Channel High Voltage Sample and Hold Amplifier Array
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FEATURES

►► 32 independent high voltage amplifiers ►► 300V operating voltage ►► 295V output voltage ►► 2.2V/µs typical output slew rate ►► Adjustable output current source limit ►► Adjustable output current sink limit ►► Internal closed loop gain of 72V/V ►► 12MΩ feedback impedance ►► Layout ideal for die applications

APPLICATIONS

►► MEMS (microelectromechanical systems) driver ►► Piezoelectric transducer driver ►► Optical crosspoint switches (using MEMS technology)

GENERAL DESCRIPTION

The Supertex All 32 sample and hold circuits share a common analog input, VSIG. The sampled voltage on the holding capacitor is buffered by a low voltage amplifier and amplified by a high voltage amplifier with a closed loop gain of 72V/V. The internal closed loop gain is set for an input voltage range of 0 to 4.096V. The input voltage can be up to 5.0V, but the output will saturate. The maximum output voltage swing is 5.0V below the VPP high voltage supply. The outputs can drive capacitive loads of up to 3000pF.